Hello Percona.
Please add scheduled backups to pbm-agent functionality, it is definitely must be configured witn pbm cli to prevent an occasion when pbm-agent is down on the same node where cron backup configured.
pbm-agent must elect for backup any available node from lowest priority Secondary, but could be Primary (optional, to avoid overload?) in case of all the Secondary’s are down.
This functionality would make PBM ready for production, otherwise it has One-Point-Of-Failure(either pbm-agent or mongo process) and is not reliable.